CN113387656A - High-strength double-component anti-crack repair mortar and preparation method thereof - Google Patents
High-strength double-component anti-crack repair mortar and preparation method thereof Download PDFInfo
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- CN113387656A CN113387656A CN202110780430.XA CN202110780430A CN113387656A CN 113387656 A CN113387656 A CN 113387656A CN 202110780430 A CN202110780430 A CN 202110780430A CN 113387656 A CN113387656 A CN 113387656A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/06—Quartz; Sand
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Civil Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses high-strength double-component anti-cracking repair mortar and a preparation method thereof, wherein the anti-cracking repair mortar consists of liquid materials and powder materials; the liquid material comprises the following components in parts by weight: 850 parts of butylbenzene emulsion 600-containing material, 1-2 parts of defoaming agent, 1-3 parts of preservative, 400 parts of water 150-containing material and 5-15 parts of ethylene glycol; the powder comprises the following components in parts by weight: 600 parts of Portland cement 350-containing material, 1-2 parts of hydroxyethyl cellulose, 1-2 parts of hydroxymethyl cellulose, 2-3 parts of anti-crack wood fiber, 600 parts of quartz sand 350-containing material and 5-15 parts of latex powder; the weight ratio of the liquid material to the powder material is 1.5-3: 1. The high-strength two-component anti-crack repair mortar has the advantages that through reasonable proportioning of the materials, the obtained mortar has low shrinkage rate, strong binding power and excellent anti-crack performance, and fully embodies the good combination of different materials and additives; the anti-crack repair mortar has good adaptability to new and old concrete bases, good water resistance and seepage resistance, protective performance to reinforcing steel bars and good bond protection effect to rusted reinforcing steel bars.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to high-strength double-component anti-cracking repair mortar and a preparation method thereof.
Background
Along with the development of modern science and technology and the improvement of people's quality of life, the demand to indoor and outdoor fitment also promotes gradually, because cement concrete tensile strength is low, and drying shrinkage is big, and along with the time, the building surface needs to be modified, however some repair departments that have structural defect are very easily dropped, the hollowing and the fracture, and then have destroyed the decoration face to lead to whole fitment quality and visual impression to descend, brought the puzzlement for the life. Therefore, it is necessary to provide an anti-crack repair mortar with good anti-crack performance and strong adhesive force.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides high-strength two-component anti-cracking repair mortar, which consists of liquid materials and powder materials;
the liquid material comprises the following components in parts by weight: 850 parts of butylbenzene emulsion 600-containing material, 1-2 parts of defoaming agent, 1-3 parts of preservative, 400 parts of water 150-containing material and 5-15 parts of ethylene glycol;
the powder comprises the following components in parts by weight: 600 parts of Portland cement 350-containing material, 1-2 parts of hydroxyethyl cellulose, 1-2 parts of hydroxymethyl cellulose, 2-3 parts of anti-crack wood fiber, 600 parts of quartz sand 350-containing material and 5-15 parts of latex powder;
the weight ratio of the liquid material to the powder material is 1.5-3: 1.
Further, the liquid material comprises the following components in parts by weight: 800 portions of butylbenzene emulsion 700-containing material, 1-2 portions of defoaming agent, 1.5-2.5 portions of preservative, 300 portions of water 200-containing material and 8-12 portions of ethylene glycol;
the powder comprises the following components in parts by weight: 550 parts of Portland cement 450-charge, 1-2 parts of hydroxyethyl cellulose, 1-2 parts of hydroxymethyl cellulose, 2-3 parts of anti-crack wood fiber, 550 parts of quartz sand 450-charge and 8-12 parts of latex powder;
the weight ratio of the liquid material to the powder material is 1.5-3: 1.
Further, the liquid material comprises the following components in parts by weight: 750 parts of butylbenzene emulsion, 1.5 parts of defoaming agent, 2 parts of preservative, 250 parts of water and 10 parts of ethylene glycol;
the powder comprises the following components in parts by weight: 500 parts of Portland cement, 1.5 parts of hydroxyethyl cellulose, 1.5 parts of hydroxymethyl cellulose, 2-3 parts of anti-crack wood fiber, 500 parts of quartz sand and 10 parts of latex powder;
the weight ratio of the liquid material to the powder material is 2: 1.
Further, the quartz sand comprises 70% of 70-140 mesh quartz sand and 30% of 50-100 mesh quartz sand.
Further, the hydroxyethyl cellulose has a viscosity of 3X 104 mpa-s (2%, 20 ℃ aqueous solution); the viscosity of the hydroxymethyl cellulose is 10 x 104mpa · s (2%, 20 ℃ aqueous solution).
Further, the defoaming agent is organic silicon, polyether or mineral oil; the preservative is a concrete sulfate-resistant preservative. The steel bar anti-corrosion coating mainly plays roles in preventing steel bars from being corroded, increasing strength, improving freeze-thaw resistance, improving impermeability and the like.
Further, the portland cement is PO 42.5 black cement; the latex powder is redispersible latex powder N5010.
The invention also provides a preparation method of the high-strength two-component anti-cracking repair mortar, which comprises the following steps:
weighing butylbenzene emulsion, a defoaming agent, a preservative, water and ethylene glycol according to the liquid-material ratio, and uniformly mixing the components for later use;
weighing portland cement, hydroxyethyl cellulose, hydroxymethyl cellulose, anti-crack wood fiber, quartz sand and latex powder according to the proportion of the powder, adding into a stirrer, uniformly mixing, and subpackaging;
when in use, the weight ratio of the liquid material to the powder material is 1.5-3: 1.
Further, the stirring time of the stirrer is 2-4 min.
The invention has the beneficial effects that:
(1) according to the high-strength two-component anti-crack repair mortar, 7623 styrene-butadiene emulsion, water, cellulose, a water reducing agent, a defoaming agent, quartz sand, emulsion powder and other materials are reasonably mixed according to a certain proportion, so that the obtained mortar has the characteristics of low shrinkage rate, strong bonding force and excellent anti-crack performance, technical indexes of the mortar in aspects of plasticity, strength, bonding force, consistency and the like are stabilized, and good combination among different materials and additives is fully reflected;
(2) the high-strength double-component anti-cracking repair mortar disclosed by the invention has good adaptability to new and old concrete base layers, strong bonding force, compact texture, good waterproof and anti-seepage properties, good protection performance on reinforcing steel bars and good bond wrapping protection effect on rusted reinforcing steel bars;
(3) the high-strength double-component anti-cracking repair mortar disclosed by the invention is good in anti-cracking performance, free of cracks in appearance, good in overall impression and visual effect, non-toxic, harmless, pollution-free, strong in weather resistance, high-temperature resistant and capable of being constructed at a low temperature.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
The invention provides high-strength double-component anti-cracking repair mortar, which consists of liquid materials and powder materials;
the liquid material comprises the following components in parts by weight: 850 parts of butylbenzene emulsion 600-containing material, 1-2 parts of defoaming agent, 1-3 parts of preservative, 400 parts of water 150-containing material and 5-15 parts of ethylene glycol;
the powder comprises the following components in parts by weight: 600 parts of Portland cement 350-containing material, 1-2 parts of hydroxyethyl cellulose, 1-2 parts of hydroxymethyl cellulose, 2-3 parts of anti-crack wood fiber, 600 parts of quartz sand 350-containing material and 5-15 parts of latex powder;
the weight ratio of the liquid material to the powder material is 1.5-3: 1.
The butylbenzene emulsion used in the invention is basf butylbenzene emulsion
ECO 7623 is butylThe diene-styrene copolymer emulsion has a glass transition temperature of 14 ℃ and a solid content of 51 +/-1%.
The hydroxyethyl cellulose is HBR 250 hydroxyethyl cellulose, which is a series of yellowish powder products, and is easily dispersed and dissolved in cold water and hot water to form aqueous solutions of different viscosities.
The redispersible latex powder is VINNAPAS 5010N, and VINNAPAS 5010N can improve the adhesiveness, breaking strength, plasticity, wear resistance and workability of the modified mixture, and has no adverse effect on the flowability, thixotropy, water retention property and the like of the material.
The high-strength double-component anti-crack repair mortar can be used for repairing defects of breakage, pitted surfaces, honeycombs, slab staggering and the like of concrete structural members such as industrial plants, civil buildings, structures, roads, bridges and the like, but is not suitable for repairing the defects of the concrete surface before tensioning in post-tensioning method prestressed members. It should be noted that the two-component anti-cracking repair mortar is not suitable for working condition environments such as high temperature, chemical corrosion, acid-base corrosion environments, septic tanks and the like, and is not suitable for a guniting construction process.
Example 1
The raw materials were measured in parts by weight according to the liquid formulation shown in example 1 in table 1; adding deionized water into a liquid material stirring cylinder, adding 7623 butylbenzene emulsion into the liquid material stirring cylinder for dispersion for 10min, then adding a defoaming agent and a preservative into the liquid material stirring cylinder, stirring for 10min, finally adding ethylene glycol, and stirring for 10min to obtain a liquid material package;
the raw materials were measured in parts by weight according to the powder formulation shown in example 1 of table 2: starting a gravity-free powder stirrer, adding portland cement, hydroxyethyl cellulose, hydroxymethyl cellulose, anti-crack wood fibers, quartz sand and latex powder into the stirrer, stirring for 3min at the rotating speed of 600rpm, and finally mixing the liquid material and the powder material according to the weight ratio of 2:1, packaging in a combined manner to obtain a finished product; when in use, the liquid and the powder are uniformly stirred according to a proportion.
Example 2
Example 2 differs from example 1 in that the formulation of the liquid and powder is as shown in example 2 of tables 1-2.
Example 3
Example 3 differs from example 1 in that the formulation of the liquid and powder is as shown in example 3 in tables 1-2.
Example 4
Example 4 differs from example 1 in that the formulation of the liquid and powder is as shown in example 4 in tables 1-2.
Example 5
Example 5 differs from example 1 in that the formulation of the liquid and powder is as shown in example 5 in tables 1-2.
Comparative example 1
Comparative example 1 differs from example 1 in that the formulation of the liquid and powder is shown in table 1-2 as comparative example 1.
Comparative example 2
Comparative example 2 differs from example 1 in that the formulation of the liquid and powder is shown in table 1-2 as comparative example 2.
TABLE 1 example and comparative example liquid formulations
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example 1 | Comparative example 2 | |
| Butylbenzene emulsion | 750 | 600 | 700 | 800 | 850 | 950 | 750 |
| Defoaming agent | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 |
| Preservative | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Deionized water | 250 | 400 | 300 | 200 | 150 | 50 | 250 |
| Ethylene glycol | 10 | 5 | 7.5 | 15 | 15 | 10 | 10 |
TABLE 2 example and comparative powder formulations
The crack-resistant repair mortars of examples and comparative examples were subjected to performance measurement.
Dry shrinkage rate: JC/T603-2004 cement mortar dry shrinkage experimental method
Compressive strength, flexural strength: GB/T17671-1999 method for testing cement mortar strength (ISO method)
Bonding strength: JGJT220-2010 technical Specification for plastering mortar
TABLE 3 comparison table of technical indexes of bonding strength
TABLE 4 Performance specifications requirements
TABLE 5 different crack resistance repair mortar Properties
The performance indexes of the crack-resistant repair mortar prepared in the embodiment of the invention in the aspects of adhesion, strength, crack resistance, appearance decoration and the like meet the general technical indexes of the standards of GB50210-2001, building decoration and finishing engineering quality acceptance standard, JGJT220-2010 plastering mortar technical specification, JGJT 70-2009 building mortar basic performance test method standard and the like, wherein the adhesion technical index reaching more than 2.5MPa is 8.3 times of the maximum value of the tensile adhesion strength of 7.10 plastering layers of the general technical standard JGJT220-2010 plastering mortar technical specification, and is 1.4 times of the epoxy repair mortar; the crack resistance completely meets the requirement of no crack of GB50210-2001 'quality acceptance standard for building decoration project' 4.2.5, and the construction process is simple and easy to operate. In addition, the stable performance and seasonal variation of the two-component anti-cracking repair mortar have no influence on various indexes of the two-component anti-cracking repair mortar.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (9)
1. The high-strength double-component anti-cracking repair mortar is characterized by comprising a liquid material and a powder material;
the liquid material comprises the following components in parts by weight: 850 parts of butylbenzene emulsion 600-containing material, 1-2 parts of defoaming agent, 1-3 parts of preservative, 400 parts of water 150-containing material and 5-15 parts of ethylene glycol;
the powder comprises the following components in parts by weight: 600 parts of Portland cement 350-containing material, 1-2 parts of hydroxyethyl cellulose, 1-2 parts of hydroxymethyl cellulose, 2-3 parts of anti-crack wood fiber, 600 parts of quartz sand 350-containing material and 5-15 parts of latex powder;
the weight ratio of the liquid material to the powder material is 1.5-3: 1.
2. The high-strength two-component anti-crack repair mortar according to claim 1,
the liquid material comprises the following components in parts by weight: 800 portions of butylbenzene emulsion 700-containing material, 1-2 portions of defoaming agent, 1.5-2.5 portions of preservative, 300 portions of water 200-containing material and 8-12 portions of ethylene glycol;
the powder comprises the following components in parts by weight: 550 parts of Portland cement 450-charge, 1-2 parts of hydroxyethyl cellulose, 1-2 parts of hydroxymethyl cellulose, 2-3 parts of anti-crack wood fiber, 550 parts of quartz sand 450-charge and 8-12 parts of latex powder;
the weight ratio of the liquid material to the powder material is 1.5-3: 1.
3. The high-strength two-component anti-crack repair mortar according to claim 2,
the liquid material comprises the following components in parts by weight: 750 parts of butylbenzene emulsion, 1.5 parts of defoaming agent, 2 parts of preservative, 250 parts of water and 10 parts of ethylene glycol;
the powder comprises the following components in parts by weight: 500 parts of Portland cement, 1.5 parts of hydroxyethyl cellulose, 1.5 parts of hydroxymethyl cellulose, 2-3 parts of anti-crack wood fiber, 500 parts of quartz sand and 10 parts of latex powder;
the weight ratio of the liquid material to the powder material is 2: 1.
4. The high-strength two-component anti-crack repair mortar according to any one of claims 1 to 3, wherein the quartz sand comprises 50 to 70% of 70 to 140 mesh quartz sand and 30 to 50% of 50 to 100 mesh quartz sand.
5. The high-strength two-component crack-resistant repair mortar according to any one of claims 1 to 3, wherein the hydroxyethyl cellulose has a viscosity of 3 x 104mpa.s (2%, 20 ℃ aqueous solution); the viscosity of the hydroxymethyl cellulose is 10 multiplied by 104mpa.s (2%, 20 ℃ aqueous solution).
6. The high-strength two-component anti-crack repair mortar according to any one of claims 1 to 3, wherein the defoaming agent is silicone, polyether or mineral oil; the preservative is a concrete sulfate-resistant preservative.
7. The high-strength two-component anti-crack repair mortar according to any one of claims 1 to 3, wherein the portland cement is PO 42.5 black cement; the latex powder is redispersible latex powder N5010.
8. The preparation method of the high-strength two-component anti-crack repair mortar according to any one of claims 1 to 7, comprising the steps of:
weighing butylbenzene emulsion, a defoaming agent, a preservative, water and ethylene glycol according to the liquid-material ratio, and uniformly mixing the components for later use;
weighing portland cement, hydroxyethyl cellulose, hydroxymethyl cellulose, anti-crack wood fiber, quartz sand and latex powder according to the proportion of the powder, adding into a stirrer, uniformly mixing, and subpackaging;
when in use, the weight ratio of the liquid material to the powder material is 1.5-3: 1.
9. The method as claimed in claim 8, wherein the stirring time of the stirrer is 2 to 4 min.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114457660A (en) * | 2022-03-10 | 2022-05-10 | 赵永录 | Concrete repairing agent formula and scraping coating equipment thereof |
| CN115108806A (en) * | 2022-05-17 | 2022-09-27 | 西卡德高(广州)企业管理有限公司 | Waterproof protective layer material and preparation method thereof |
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| CA1073577A (en) * | 1974-06-03 | 1980-03-11 | The Dow Chemical Company | Shrinkage-compensating portland cement concrete and mortar compositions |
| CN107673692A (en) * | 2017-09-29 | 2018-02-09 | 佛山市涂无忧建材有限公司 | A kind of rigid anticracking waterproof coating and preparation method thereof |
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| CA1073577A (en) * | 1974-06-03 | 1980-03-11 | The Dow Chemical Company | Shrinkage-compensating portland cement concrete and mortar compositions |
| CN107673692A (en) * | 2017-09-29 | 2018-02-09 | 佛山市涂无忧建材有限公司 | A kind of rigid anticracking waterproof coating and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114457660A (en) * | 2022-03-10 | 2022-05-10 | 赵永录 | Concrete repairing agent formula and scraping coating equipment thereof |
| CN115108806A (en) * | 2022-05-17 | 2022-09-27 | 西卡德高(广州)企业管理有限公司 | Waterproof protective layer material and preparation method thereof |
| CN115108806B (en) * | 2022-05-17 | 2023-08-25 | 西卡德高(广州)企业管理有限公司 | Waterproof protective layer material and preparation method thereof |
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Application publication date: 20210914 |